Improvement in sawing-machines



F. M. CARNAHAN. Sawing-Machine. .No.168,226. PatentedSept.28 ,1875.

ATTORNEYS N,FETERS. PNOTO-LITHOGRAPMER, WASHINGTON. D C

ATLENT ()FFICE FRANCIS M. GARNAHAN, OF ADRIAN, MICHIGAN.

IMPROVEMENT IN S AWING-I VIACHINES.

Specification formin g part of Letters Patent No. 168,226, dated September 28, 1875 application filed August 21, 1875.

To all whom it may concern;

Be it known that I, FRANCIS M. UARNAHAN, ofAdrian, in the'county of Lenawee and State of Michigamhave invented a new and valuable Improvement in S'awingMachines; and I do hereby declare thatthe following is a full, clear,

. and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this operating cross-cut or drag saws; and the natureof the invention consists in the arrangement and novel construction, in connection with a crosscut-saw, of a gin-a vertically-vibrating rod, to which the saw is pivoted, de-

pending from the apex of the ginan operating-lever, and a connecting-rod, whereby the operation of severing a log is greatly facilitated, and a single operative is enabled to do the work of two, as will be hereinafter more fully explained and claimed. v

In the annexed'drawings, the letter A designates the main beams of my improved gin or supporting-derrick, which beams are rigidly secured together at their point of convergence, and are connected near their lower ends by a beam or bar, a. B represents-a crotched leg, pivoted at b to the upper ends of beams A, the lower end of which is provided with two or more spaced perforations, through which a spike, O, is designed to be forced into a log, thus preventing the same from rolling, andaffording the'part A adequate support. D represents a horizontallyarranged rock-shaft, having its bearings near the apex of beams A,-into which is mortiscd a rod, E, of suitable length. E is a crosscnt-saw of the usual construction, which is provided with a shank, 0, of curved form, by means of which it is pivoted in'the, lower furcated end of rod E. This rod is caused to vibrate vertically, thus transmitting a curvilinear reciprocating movement to the saw by means of a vertically-vibrating operating-lever, F, which is mortised into a rock-shaft, G, having its bearings near the lower ends of beams A, through the medium of a connecting-rod, H, one end of which is pivoted in a recess, 6, of lever F, and the other detachably and adjustably secured to rod E. This adjustment is secured by the following means: The free end of connecting-rod H is provided with a flat metallic prolongation, f, the lower edge of which is provided with spaced notches n, and this prolongation is adapted to be passed through a lon-.

gitudinal slot, S, in pendent rod E, which slot is traversed, after the manner of the rungs in a ladder, by metallic rods t','which are sufficiently spaced to admit prolongation f. be-

- tween them.

The object of this adjustment is to increase or lessen the length of the stroke of the saw, as the necessities of each particular case may require, I

In order to adjust the gin in a vertical po sition, whatever be the inequalities of the soil, I use equalizer-blocks I, which are adjustably clamped against the lower ends of beams A by means of set-screws S passing through suitable perforations and slots in the said beams and'blocks. By this means, the log being ina horizontal position, the saw will be in a plane vertical to the long axis thereof, and the kerf will be vertical. I am also able, by inclining the log, to produce a kerf at an angle to the length of the log, and to produce any desired bevel.

In order that the triangular frame A A may not slip during the operation of sawing, the lower ends of equalizer-blocks I are provided witlra metallic band, g, between which and the said blocks a flat-headed bolt, h, is passed.

This bolt is adapted to be forcibly driven into Z, the operative, by pressing upon the platform of the treadle during the operation of the saw, will transfer the Weight thus applied to the beams A of the gin, and will hold bolts h to their engagement with the soil.

What I claim as new, and desire to secure by Letters Patent, is-- p 1. .The gin A B, vibrating supporting-rod E, connecting-rod H, and vertically-vibrating opcrating-lever F, in combination With a crosscutsaw, E, substantially as specified.

2. The combination, with the saw E and operating-lever F, of the connecting-rod H, having notched prolongation f, and the slotted supporting-rod E, having spaced rods 13, substantially as specified.

FRANCIS M. OARNAHAN.

Witnesses:

R. B. ROBBINS, THos. H. GREENLY. 

